大型桥梁桥塔监测的GNSS相对对流层延迟估计GNSS relative tropospheric delay estimation for large bridge pylon monitoring
高兴旺,李付岗,张秋昭,吴来义,杨威,戴新军
摘要(Abstract)：
针对大型桥梁桥塔与基站高程差异较大,残余对流层延迟成为影响全球卫星导航系统(GNSS)监测成功率与精度的主要因素之一。该文基于随机过程理论,对桥梁监测GNSS残余对流层湿延迟进行参数估计,有效地提高了桥梁塔顶监测GNSS模糊度固定率。通过采用对流层经验模型改正对流层干延迟,将基准站和塔顶观测站对流层湿延迟组成相对对流层湿延迟,并联合位置参数和模糊度参数建立双差卡尔曼模型,最后利用最小二乘模糊度降低相关平差法(LAMBDA)对双差模糊度进行固定,并估计位置参数与相对对流层延迟参数。实验结果表明,该方法可以有效估计相对对流层延迟,有效提高GNSS模糊度固定率。
关键词(KeyWords)： 随机过程;相对对流层湿延迟;模糊度参数;卡尔曼滤波
基金项目(Foundation): 江苏省政府政策引导计划国际科技合作项目（BZ2017056）;; 江苏省资源环境信息工程重点实验室开放基金项目（JS201904）;; 国家自然科学基金资助项目（41811530304）
作者(Author): 高兴旺,李付岗,张秋昭,吴来义,杨威,戴新军
DOI: 10.16251/j.cnki.1009-2307.2021.02.007
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